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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-1215] speculatively evaluate multiple query plans for each $or clause (even after 101 matches found for query)</title>
                <link>https://jira.mongodb.org/browse/SERVER-1215</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For non $or queries, the query optimizer attempts to speculatively evaluate a query using multiple indexes in parallel, until 101 matches are found with a single index.&lt;/p&gt;

&lt;p&gt;For $or queries, each $or clause can potentially speculatively evaluate multiple indexes.  However, after 101 total matches are found speculative evaluation is stopped and an index is chosen arbitrarily for each $or clause.&lt;/p&gt;

&lt;p&gt;This ticket represents allowing speculative index evaluation in $or clauses even after the first 101 matches are found.&lt;/p&gt;</description>
                <environment></environment>
        <key id="12113">SERVER-1215</key>
            <summary>speculatively evaluate multiple query plans for each $or clause (even after 101 matches found for query)</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
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                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Jun 2010 18:04:27 +0000</created>
                <updated>Wed, 28 Jan 2015 20:02:40 +0000</updated>
                            <resolved>Wed, 28 Jan 2015 20:02:40 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>2</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="815783" author="david.storch" created="Wed, 28 Jan 2015 20:02:17 +0000"  >&lt;p&gt;I believe this has been fixed with the introduction of the Subplanner, a query execution stage responsible for selecting the best query plan for each clause of a rooted $or query. The Subplanner was introduced for version 2.6.0 under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13184&quot; title=&quot;2.6 should explore same number of one index solns as 2.4&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13184&quot;&gt;&lt;del&gt;SERVER-13184&lt;/del&gt;&lt;/a&gt;. Resolving as a duplicate.&lt;/p&gt;
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